Do what it says: Please wait until it is up to date
you can download the blockchain which will do 85% of the downloading for you here: https://db.burst-team.us/db.zip
you put this into your /burst_db folder which in most cases is in %appdata%/Burst/burst_db
put this in there, launch the local wallet and just wait about 15~30 minutes and it will be up and ready instead of waiting days starting from the starting block and up.